| /* |
| * WavPack demuxer |
| * Copyright (c) 2006,2011 Konstantin Shishkov |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/dict.h" |
| #include "avformat.h" |
| #include "internal.h" |
| #include "apetag.h" |
| #include "id3v1.h" |
| #include "wv.h" |
| |
| enum WV_FLAGS { |
| WV_MONO = 0x0004, |
| WV_HYBRID = 0x0008, |
| WV_JOINT = 0x0010, |
| WV_CROSSD = 0x0020, |
| WV_HSHAPE = 0x0040, |
| WV_FLOAT = 0x0080, |
| WV_INT32 = 0x0100, |
| WV_HBR = 0x0200, |
| WV_HBAL = 0x0400, |
| WV_MCINIT = 0x0800, |
| WV_MCEND = 0x1000, |
| WV_DSD = 0x80000000, |
| }; |
| |
| static const int wv_rates[16] = { |
| 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000, |
| 32000, 44100, 48000, 64000, 88200, 96000, 192000, -1 |
| }; |
| |
| typedef struct WVContext { |
| uint8_t block_header[WV_HEADER_SIZE]; |
| WvHeader header; |
| int rate, chan, bpp; |
| uint32_t chmask; |
| int multichannel; |
| int block_parsed; |
| int64_t pos; |
| |
| int64_t apetag_start; |
| } WVContext; |
| |
| static int wv_probe(const AVProbeData *p) |
| { |
| /* check file header */ |
| if (p->buf_size <= 32) |
| return 0; |
| if (AV_RL32(&p->buf[0]) == MKTAG('w', 'v', 'p', 'k') && |
| AV_RL32(&p->buf[4]) >= 24 && |
| AV_RL32(&p->buf[4]) <= WV_BLOCK_LIMIT && |
| AV_RL16(&p->buf[8]) >= 0x402 && |
| AV_RL16(&p->buf[8]) <= 0x410) |
| return AVPROBE_SCORE_MAX; |
| else |
| return 0; |
| } |
| |
| static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb) |
| { |
| WVContext *wc = ctx->priv_data; |
| int ret; |
| int rate, bpp, chan; |
| uint32_t chmask, flags; |
| |
| wc->pos = avio_tell(pb); |
| |
| /* don't return bogus packets with the ape tag data */ |
| if (wc->apetag_start && wc->pos >= wc->apetag_start) |
| return AVERROR_EOF; |
| |
| ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE); |
| if (ret != WV_HEADER_SIZE) |
| return (ret < 0) ? ret : AVERROR_EOF; |
| |
| ret = ff_wv_parse_header(&wc->header, wc->block_header); |
| if (ret < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n"); |
| return ret; |
| } |
| |
| if (wc->header.flags & WV_DSD) { |
| avpriv_report_missing_feature(ctx, "WV DSD"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (wc->header.version < 0x402 || wc->header.version > 0x410) { |
| avpriv_report_missing_feature(ctx, "WV version 0x%03X", |
| wc->header.version); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| /* Blocks with zero samples don't contain actual audio information |
| * and should be ignored */ |
| if (!wc->header.samples) |
| return 0; |
| // parse flags |
| flags = wc->header.flags; |
| bpp = ((flags & 3) + 1) << 3; |
| chan = 1 + !(flags & WV_MONO); |
| chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO; |
| rate = wv_rates[(flags >> 23) & 0xF]; |
| wc->multichannel = !(wc->header.initial && wc->header.final); |
| if (wc->multichannel) { |
| chan = wc->chan; |
| chmask = wc->chmask; |
| } |
| if ((rate == -1 || !chan) && !wc->block_parsed) { |
| int64_t block_end = avio_tell(pb) + wc->header.blocksize; |
| if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Cannot determine additional parameters\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| while (avio_tell(pb) < block_end && !avio_feof(pb)) { |
| int id, size; |
| id = avio_r8(pb); |
| size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb); |
| size <<= 1; |
| if (id & 0x40) |
| size--; |
| switch (id & 0x3F) { |
| case 0xD: |
| if (size <= 1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Insufficient channel information\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| chan = avio_r8(pb); |
| switch (size - 2) { |
| case 0: |
| chmask = avio_r8(pb); |
| break; |
| case 1: |
| chmask = avio_rl16(pb); |
| break; |
| case 2: |
| chmask = avio_rl24(pb); |
| break; |
| case 3: |
| chmask = avio_rl32(pb); |
| break; |
| case 4: |
| avio_skip(pb, 1); |
| chan |= (avio_r8(pb) & 0xF) << 8; |
| chan += 1; |
| chmask = avio_rl24(pb); |
| break; |
| case 5: |
| avio_skip(pb, 1); |
| chan |= (avio_r8(pb) & 0xF) << 8; |
| chan += 1; |
| chmask = avio_rl32(pb); |
| break; |
| default: |
| av_log(ctx, AV_LOG_ERROR, |
| "Invalid channel info size %d\n", size); |
| return AVERROR_INVALIDDATA; |
| } |
| break; |
| case 0x27: |
| rate = avio_rl24(pb); |
| break; |
| default: |
| avio_skip(pb, size); |
| } |
| if (id & 0x40) |
| avio_skip(pb, 1); |
| } |
| if (rate == -1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Cannot determine custom sampling rate\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET); |
| } |
| if (!wc->bpp) |
| wc->bpp = bpp; |
| if (!wc->chan) |
| wc->chan = chan; |
| if (!wc->chmask) |
| wc->chmask = chmask; |
| if (!wc->rate) |
| wc->rate = rate; |
| |
| if (flags && bpp != wc->bpp) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Bits per sample differ, this block: %i, header block: %i\n", |
| bpp, wc->bpp); |
| return AVERROR_INVALIDDATA; |
| } |
| if (flags && !wc->multichannel && chan != wc->chan) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Channels differ, this block: %i, header block: %i\n", |
| chan, wc->chan); |
| return AVERROR_INVALIDDATA; |
| } |
| if (flags && rate != -1 && rate != wc->rate) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Sampling rate differ, this block: %i, header block: %i\n", |
| rate, wc->rate); |
| return AVERROR_INVALIDDATA; |
| } |
| return 0; |
| } |
| |
| static int wv_read_header(AVFormatContext *s) |
| { |
| AVIOContext *pb = s->pb; |
| WVContext *wc = s->priv_data; |
| AVStream *st; |
| int ret; |
| |
| wc->block_parsed = 0; |
| for (;;) { |
| if ((ret = wv_read_block_header(s, pb)) < 0) |
| return ret; |
| if (!wc->header.samples) |
| avio_skip(pb, wc->header.blocksize); |
| else |
| break; |
| } |
| |
| /* now we are ready: build format streams */ |
| st = avformat_new_stream(s, NULL); |
| if (!st) |
| return AVERROR(ENOMEM); |
| st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| st->codecpar->codec_id = AV_CODEC_ID_WAVPACK; |
| st->codecpar->channels = wc->chan; |
| st->codecpar->channel_layout = wc->chmask; |
| st->codecpar->sample_rate = wc->rate; |
| st->codecpar->bits_per_coded_sample = wc->bpp; |
| avpriv_set_pts_info(st, 64, 1, wc->rate); |
| st->start_time = 0; |
| if (wc->header.total_samples != 0xFFFFFFFFu) |
| st->duration = wc->header.total_samples; |
| |
| if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) { |
| int64_t cur = avio_tell(s->pb); |
| wc->apetag_start = ff_ape_parse_tag(s); |
| if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) |
| ff_id3v1_read(s); |
| avio_seek(s->pb, cur, SEEK_SET); |
| } |
| |
| return 0; |
| } |
| |
| static int wv_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| WVContext *wc = s->priv_data; |
| int ret; |
| int off; |
| int64_t pos; |
| uint32_t block_samples; |
| |
| if (avio_feof(s->pb)) |
| return AVERROR_EOF; |
| if (wc->block_parsed) { |
| if ((ret = wv_read_block_header(s, s->pb)) < 0) |
| return ret; |
| } |
| |
| pos = wc->pos; |
| if (av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE) < 0) |
| return AVERROR(ENOMEM); |
| memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE); |
| ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize); |
| if (ret != wc->header.blocksize) { |
| av_packet_unref(pkt); |
| return AVERROR(EIO); |
| } |
| while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) { |
| if ((ret = wv_read_block_header(s, s->pb)) < 0) { |
| av_packet_unref(pkt); |
| return ret; |
| } |
| |
| off = pkt->size; |
| if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) { |
| av_packet_unref(pkt); |
| return ret; |
| } |
| memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE); |
| |
| ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize); |
| if (ret != wc->header.blocksize) { |
| av_packet_unref(pkt); |
| return (ret < 0) ? ret : AVERROR_EOF; |
| } |
| } |
| pkt->stream_index = 0; |
| pkt->pos = pos; |
| wc->block_parsed = 1; |
| pkt->pts = wc->header.block_idx; |
| block_samples = wc->header.samples; |
| if (block_samples > INT32_MAX) |
| av_log(s, AV_LOG_WARNING, |
| "Too many samples in block: %"PRIu32"\n", block_samples); |
| else |
| pkt->duration = block_samples; |
| |
| return 0; |
| } |
| |
| AVInputFormat ff_wv_demuxer = { |
| .name = "wv", |
| .long_name = NULL_IF_CONFIG_SMALL("WavPack"), |
| .priv_data_size = sizeof(WVContext), |
| .read_probe = wv_probe, |
| .read_header = wv_read_header, |
| .read_packet = wv_read_packet, |
| .flags = AVFMT_GENERIC_INDEX, |
| }; |
